64400146 has 8 divisors (see below), whose sum is σ = 96647040. Its totient is φ = 32184468.

The previous prime is 64400137. The next prime is 64400153. The reversal of 64400146 is 64100446.

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

It is a self number, because there is not a number n which added to its sum of digits gives 64400146.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1686 + ... + 11473.

It is an arithmetic number, because the mean of its divisors is an integer number (12080880).

Almost surely, 2^64400146 is an apocalyptic number.

64400146 is a deficient number, since it is larger than the sum of its proper divisors (32246894).

64400146 is a wasteful number, since it uses less digits than its factorization.

64400146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15608.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 64400146 is about 8024.9701557077. The cubic root of 64400146 is about 400.8319061310.

It can be divided in two parts, 64400 and 146, that added together give a palindrome (64546).

The spelling of 64400146 in words is "sixty-four million, four hundred thousand, one hundred forty-six".