65973440 has 56 divisors (see below), whose sum is σ = 169194480. Its totient is φ = 24357888.

The previous prime is 65973433. The next prime is 65973451. The reversal of 65973440 is 4437956.

It is a junction number, because it is equal to n+sod(n) for n = 65973394 and 65973403.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3770 + ... + 12089.

It is an arithmetic number, because the mean of its divisors is an integer number (3021330).

Almost surely, 2^65973440 is an apocalyptic number.

It is an amenable number.

65973440 is an abundant number, since it is smaller than the sum of its proper divisors (103221040).

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

65973440 is a wasteful number, since it uses less digits than its factorization.

65973440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15889 (or 15879 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 38.

The square root of 65973440 is about 8122.4035851465. The cubic root of 65973440 is about 404.0697850237.

The spelling of 65973440 in words is "sixty-five million, nine hundred seventy-three thousand, four hundred forty".