65391950 has 48 divisors (see below), whose sum is σ = 134574720. Its totient is φ = 23483520.

The previous prime is 65391947. The next prime is 65391973. The reversal of 65391950 is 5919356.

It is a super-2 number, since 2×65391950² = 8552214249605000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22691 + ... + 25409.

It is an arithmetic number, because the mean of its divisors is an integer number (2803640).

Almost surely, 2^65391950 is an apocalyptic number.

65391950 is an abundant number, since it is smaller than the sum of its proper divisors (69182770).

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

65391950 is a wasteful number, since it uses less digits than its factorization.

65391950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2781 (or 2776 counting only the distinct ones).

The product of its (nonzero) digits is 36450, while the sum is 38.

The square root of 65391950 is about 8086.5289216078. The cubic root of 65391950 is about 402.8791227430.

The spelling of 65391950 in words is "sixty-five million, three hundred ninety-one thousand, nine hundred fifty".