64400937 has 8 divisors (see below), whose sum is σ = 90387360. Its totient is φ = 40674240.

The previous prime is 64400923. The next prime is 64400939. The reversal of 64400937 is 73900446.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64400937 - 2¹² = 64396841 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64400898 and 64400907.

It is not an unprimeable number, because it can be changed into a prime (64400939) 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, 564864 + ... + 564977.

It is an arithmetic number, because the mean of its divisors is an integer number (11298420).

Almost surely, 2^64400937 is an apocalyptic number.

It is an amenable number.

64400937 is a deficient number, since it is larger than the sum of its proper divisors (25986423).

64400937 is a wasteful number, since it uses less digits than its factorization.

64400937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1129863.

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 64400937 is about 8025.0194392288. The cubic root of 64400937 is about 400.8335472077.

The spelling of 64400937 in words is "sixty-four million, four hundred thousand, nine hundred thirty-seven".