64194404 has 12 divisors (see below), whose sum is σ = 112431228. Its totient is φ = 32071200.

The previous prime is 64194379. The next prime is 64194409. The reversal of 64194404 is 40449146.

It can be written as a sum of positive squares in 2 ways, for example, as 15194404 + 49000000 = 3898^2 + 7000^2 .

It is not an unprimeable number, because it can be changed into a prime (64194409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 287 + ... + 11334.

It is an arithmetic number, because the mean of its divisors is an integer number (9369269).

Almost surely, 2^64194404 is an apocalyptic number.

It is an amenable number.

64194404 is a deficient number, since it is larger than the sum of its proper divisors (48236824).

64194404 is a wasteful number, since it uses less digits than its factorization.

64194404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13006 (or 13004 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 64194404 is about 8012.1410372010. The cubic root of 64194404 is about 400.4045989446.

The spelling of 64194404 in words is "sixty-four million, one hundred ninety-four thousand, four hundred four".