64490734 has 16 divisors (see below), whose sum is σ = 120606336. Its totient is φ = 25126200.

The previous prime is 64490729. The next prime is 64490737. The reversal of 64490734 is 43709446.

It is a junction number, because it is equal to n+sod(n) for n = 64490693 and 64490702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64490737) 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, 209232 + ... + 209539.

It is an arithmetic number, because the mean of its divisors is an integer number (7537896).

Almost surely, 2^64490734 is an apocalyptic number.

64490734 is a deficient number, since it is larger than the sum of its proper divisors (56115602).

64490734 is a wasteful number, since it uses less digits than its factorization.

64490734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418791.

The product of its (nonzero) digits is 72576, while the sum is 37.

The square root of 64490734 is about 8030.6123054223. The cubic root of 64490734 is about 401.0197605120.

It can be divided in two parts, 644 and 90734, that added together give a triangular number (91378 = T₄₂₇).

The spelling of 64490734 in words is "sixty-four million, four hundred ninety thousand, seven hundred thirty-four".