64920000 has 140 divisors (see below), whose sum is σ = 215037416. Its totient is φ = 17280000.

The previous prime is 64919993. The next prime is 64920013. The reversal of 64920000 is 2946.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 119730 + ... + 120270.

Almost surely, 2^64920000 is an apocalyptic number.

64920000 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64920000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107518708).

64920000 is an abundant number, since it is smaller than the sum of its proper divisors (150117416).

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

64920000 is an equidigital number, since it uses as much as digits as its factorization.

64920000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576 (or 551 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 64920000 is about 8057.2948313935. The cubic root of 64920000 is about 401.9075552880.

Adding to 64920000 its reverse (2946), we get a palindrome (64922946).

The spelling of 64920000 in words is "sixty-four million, nine hundred twenty thousand".