53879640 has 32 divisors (see below), whose sum is σ = 161639280. Its totient is φ = 14367872.

The previous prime is 53879603. The next prime is 53879677. The reversal of 53879640 is 4697835.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (53879603) and next prime (53879677).

It is a junction number, because it is equal to n+sod(n) for n = 53879592 and 53879601.

It is a congruent number.

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, 224379 + ... + 224618.

Almost surely, 2^53879640 is an apocalyptic number.

It is an amenable number.

53879640 is an abundant number, since it is smaller than the sum of its proper divisors (107759640).

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

53879640 is a wasteful number, since it uses less digits than its factorization.

53879640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449011 (or 449007 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 53879640 is about 7340.2751992006. The cubic root of 53879640 is about 377.6952836662.

The spelling of 53879640 in words is "fifty-three million, eight hundred seventy-nine thousand, six hundred forty".