65138408 has 16 divisors (see below), whose sum is σ = 126346500. Its totient is φ = 31446016.

The previous prime is 65138399. The next prime is 65138417. The reversal of 65138408 is 80483156.

It is an interprime number because it is at equal distance from previous prime (65138399) and next prime (65138417).

It can be written as a sum of positive squares in 2 ways, for example, as 64288324 + 850084 = 8018^2 + 922^2 .

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, 140153 + ... + 140616.

Almost surely, 2^65138408 is an apocalyptic number.

It is an amenable number.

65138408 is a deficient number, since it is larger than the sum of its proper divisors (61208092).

65138408 is a wasteful number, since it uses less digits than its factorization.

65138408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280804 (or 280800 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 65138408 is about 8070.8368834960. The cubic root of 65138408 is about 402.3577584650.

The spelling of 65138408 in words is "sixty-five million, one hundred thirty-eight thousand, four hundred eight".