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20222688 = 2531911087
BaseRepresentation
bin100110100100…
…1001011100000
31102001102022110
41031021023200
520134111223
62001235320
7333614163
oct115111340
942042273
1020222688
1110462672
126932b40
1342608b5
142985ada
151b96d93
hex13492e0

20222688 has 48 divisors (see below), whose sum is σ = 55883520. Its totient is φ = 6385536.

The previous prime is 20222621. The next prime is 20222689. The reversal of 20222688 is 88622202.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20222689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3720 + ... + 7367.

It is an arithmetic number, because the mean of its divisors is an integer number (1164240).

Almost surely, 220222688 is an apocalyptic number.

It is an amenable number.

20222688 is an abundant number, since it is smaller than the sum of its proper divisors (35660832).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20222688 is a wasteful number, since it uses less digits than its factorization.

20222688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11119 (or 11111 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 20222688 is about 4496.9643093981. The cubic root of 20222688 is about 272.4454925627.

It can be divided in two parts, 20222 and 688, that added together give a triangular number (20910 = T204).

The spelling of 20222688 in words is "twenty million, two hundred twenty-two thousand, six hundred eighty-eight".

Divisors: 1 2 3 4 6 8 12 16 19 24 32 38 48 57 76 96 114 152 228 304 456 608 912 1824 11087 22174 33261 44348 66522 88696 133044 177392 210653 266088 354784 421306 532176 631959 842612 1064352 1263918 1685224 2527836 3370448 5055672 6740896 10111344 20222688