64629040 has 60 divisors (see below), whose sum is σ = 174805776. Its totient is φ = 22157184.

The previous prime is 64629007. The next prime is 64629049. The reversal of 64629040 is 4092646.

It is a super-2 number, since 2×64629040² = 8353825622643200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64628993 and 64629011.

It is not an unprimeable number, because it can be changed into a prime (64629049) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4324 + ... + 12163.

Almost surely, 2^64629040 is an apocalyptic number.

It is an amenable number.

64629040 is an abundant number, since it is smaller than the sum of its proper divisors (110176736).

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

64629040 is a wasteful number, since it uses less digits than its factorization.

64629040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16514 (or 16501 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 64629040 is about 8039.2188675269. The cubic root of 64629040 is about 401.3062297663.

The spelling of 64629040 in words is "sixty-four million, six hundred twenty-nine thousand, forty".