67900644 has 72 divisors (see below), whose sum is σ = 197241408. Its totient is φ = 19293120.

The previous prime is 67900631. The next prime is 67900667. The reversal of 67900644 is 44600976.

67900644 is a `hidden beast` number, since 6 + 7 + 9 + 0 + 0 + 644 = 666.

It is a super-2 number, since 2×67900644² = 9220994911229472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 67900599 and 67900608.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52534 + ... + 53810.

It is an arithmetic number, because the mean of its divisors is an integer number (2739464).

Almost surely, 2^67900644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 67900644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98620704).

67900644 is an abundant number, since it is smaller than the sum of its proper divisors (129340764).

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

67900644 is a wasteful number, since it uses less digits than its factorization.

67900644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1505 (or 1500 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 67900644 is about 8240.1847066677. The cubic root of 67900644 is about 407.9666206833.

The spelling of 67900644 in words is "sixty-seven million, nine hundred thousand, six hundred forty-four".