64799040 has 56 divisors (see below), whose sum is σ = 205740000. Its totient is φ = 17279488.

The previous prime is 64799029. The next prime is 64799047. The reversal of 64799040 is 4099746.

It is a self number, because there is not a number n which added to its sum of digits gives 64799040.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64799047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32790 + ... + 34709.

Almost surely, 2^64799040 is an apocalyptic number.

64799040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64799040 is an abundant number, since it is smaller than the sum of its proper divisors (140940960).

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

64799040 is a wasteful number, since it uses less digits than its factorization.

64799040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67519 (or 67509 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 64799040 is about 8049.7850902990. The cubic root of 64799040 is about 401.6577865345.

The spelling of 64799040 in words is "sixty-four million, seven hundred ninety-nine thousand, forty".