64690356 has 48 divisors (see below), whose sum is σ = 155837696. Its totient is φ = 20870784.

The previous prime is 64690349. The next prime is 64690357. The reversal of 64690356 is 65309646.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64690357) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162750 + ... + 163146.

Almost surely, 2^64690356 is an apocalyptic number.

It is an amenable number.

64690356 is an abundant number, since it is smaller than the sum of its proper divisors (91147340).

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

64690356 is a wasteful number, since it uses less digits than its factorization.

64690356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808 (or 806 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 39.

The square root of 64690356 is about 8043.0315180285. The cubic root of 64690356 is about 401.4331010880.

The spelling of 64690356 in words is "sixty-four million, six hundred ninety thousand, three hundred fifty-six".