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61980950 = 2521239619
BaseRepresentation
bin1110110001110…
…0000100010110
311022121221212202
43230130010112
5111331342300
610052244502
71351554323
oct354340426
9138557782
1061980950
1131a94229
1218910732
13cac1825
148335b4a
155694ad5
hex3b1c116

61980950 has 12 divisors (see below), whose sum is σ = 115284660. Its totient is φ = 24792360.

The previous prime is 61980949. The next prime is 61980967. The reversal of 61980950 is 5908916.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 619760 + ... + 619859.

It is an arithmetic number, because the mean of its divisors is an integer number (9607055).

Almost surely, 261980950 is an apocalyptic number.

61980950 is a deficient number, since it is larger than the sum of its proper divisors (53303710).

61980950 is a wasteful number, since it uses less digits than its factorization.

61980950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1239631 (or 1239626 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 61980950 is about 7872.7981048672. The cubic root of 61980950 is about 395.7486203451.

The spelling of 61980950 in words is "sixty-one million, nine hundred eighty thousand, nine hundred fifty".

Divisors: 1 2 5 10 25 50 1239619 2479238 6198095 12396190 30990475 61980950