64137340 has 24 divisors (see below), whose sum is σ = 140545440. Its totient is φ = 24539328.

The previous prime is 64137301. The next prime is 64137343. The reversal of 64137340 is 4373146.

It is a super-2 number, since 2×64137340² = 8227196764551200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64137299 and 64137308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64137343) 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, 69255 + ... + 70174.

It is an arithmetic number, because the mean of its divisors is an integer number (5856060).

Almost surely, 2^64137340 is an apocalyptic number.

It is an amenable number.

64137340 is an abundant number, since it is smaller than the sum of its proper divisors (76408100).

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

64137340 is a wasteful number, since it uses less digits than its factorization.

64137340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139461 (or 139459 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 64137340 is about 8008.5791498867. The cubic root of 64137340 is about 400.2859205749.

The spelling of 64137340 in words is "sixty-four million, one hundred thirty-seven thousand, three hundred forty".