64139148 has 48 divisors (see below), whose sum is σ = 166813920. Its totient is φ = 21312000.

The previous prime is 64139087. The next prime is 64139149. The reversal of 64139148 is 84193146.

64139148 is a `hidden beast` number, since 641 + 3 + 9 + 1 + 4 + 8 = 666.

It is a super-2 number, since 2×64139148² = 8227660612331808, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (64139149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42568 + ... + 44048.

It is an arithmetic number, because the mean of its divisors is an integer number (3475290).

Almost surely, 2^64139148 is an apocalyptic number.

It is an amenable number.

64139148 is an abundant number, since it is smaller than the sum of its proper divisors (102674772).

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

64139148 is a wasteful number, since it uses less digits than its factorization.

64139148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1895 (or 1887 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 64139148 is about 8008.6920280405. The cubic root of 64139148 is about 400.2896818271.

The spelling of 64139148 in words is "sixty-four million, one hundred thirty-nine thousand, one hundred forty-eight".