65407538 has 32 divisors (see below), whose sum is σ = 123171840. Its totient is φ = 25399440.

The previous prime is 65407523. The next prime is 65407541. The reversal of 65407538 is 83570456.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 773 + ... + 11463.

It is an arithmetic number, because the mean of its divisors is an integer number (3849120).

Almost surely, 2^65407538 is an apocalyptic number.

65407538 is a deficient number, since it is larger than the sum of its proper divisors (57764302).

65407538 is a wasteful number, since it uses less digits than its factorization.

65407538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10742.

The product of its (nonzero) digits is 100800, while the sum is 38.

The square root of 65407538 is about 8087.4926893321. The cubic root of 65407538 is about 402.9111327015.

The spelling of 65407538 in words is "sixty-five million, four hundred seven thousand, five hundred thirty-eight".