64537340 has 24 divisors (see below), whose sum is σ = 154889952. Its totient is φ = 22127040.

The previous prime is 64537339. The next prime is 64537349. The reversal of 64537340 is 4373546.

It is a junction number, because it is equal to n+sod(n) for n = 64537297 and 64537306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64537349) 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, 230351 + ... + 230630.

It is an arithmetic number, because the mean of its divisors is an integer number (6453748).

Almost surely, 2^64537340 is an apocalyptic number.

It is an amenable number.

64537340 is an abundant number, since it is smaller than the sum of its proper divisors (90352612).

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

64537340 is a wasteful number, since it uses less digits than its factorization.

64537340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460997 (or 460995 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 32.

The square root of 64537340 is about 8033.5135526120. The cubic root of 64537340 is about 401.1163398981.

The spelling of 64537340 in words is "sixty-four million, five hundred thirty-seven thousand, three hundred forty".