64499400 has 144 divisors (see below), whose sum is σ = 247603200. Its totient is φ = 14739840.

The previous prime is 64499389. The next prime is 64499423. The reversal of 64499400 is 499446.

64499400 is a `hidden beast` number, since 644 + 9 + 9 + 4 + 0 + 0 = 666.

64499400 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 10041 + ... + 15159.

Almost surely, 2^64499400 is an apocalyptic number.

64499400 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 64499400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123801600).

64499400 is an abundant number, since it is smaller than the sum of its proper divisors (183103800).

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

64499400 is a wasteful number, since it uses less digits than its factorization.

64499400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5148 (or 5136 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 64499400 is about 8031.1518476493. The cubic root of 64499400 is about 401.0377221703.

The spelling of 64499400 in words is "sixty-four million, four hundred ninety-nine thousand, four hundred".