64874940 has 96 divisors (see below), whose sum is σ = 202008576. Its totient is φ = 15448320.

The previous prime is 64874939. The next prime is 64874951. The reversal of 64874940 is 4947846.

64874940 = T₁₁₁ + T₁₁₂ + ... + T₇₃₀.

It is a junction number, because it is equal to n+sod(n) for n = 64874892 and 64874901.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22839 + ... + 25521.

It is an arithmetic number, because the mean of its divisors is an integer number (2104256).

Almost surely, 2^64874940 is an apocalyptic number.

64874940 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64874940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101004288).

64874940 is an abundant number, since it is smaller than the sum of its proper divisors (137133636).

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

64874940 is a wasteful number, since it uses less digits than its factorization.

64874940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2739 (or 2737 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 42.

The square root of 64874940 is about 8054.4981221675. The cubic root of 64874940 is about 401.8145477607.

The spelling of 64874940 in words is "sixty-four million, eight hundred seventy-four thousand, nine hundred forty".