83899540 has 24 divisors (see below), whose sum is σ = 176504832. Its totient is φ = 33499680.

The previous prime is 83899537. The next prime is 83899549. The reversal of 83899540 is 4599838.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83899549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8685 + ... + 15595.

It is an arithmetic number, because the mean of its divisors is an integer number (7354368).

Almost surely, 2^83899540 is an apocalyptic number.

It is an amenable number.

83899540 is an abundant number, since it is smaller than the sum of its proper divisors (92605292).

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

83899540 is a wasteful number, since it uses less digits than its factorization.

83899540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7527 (or 7525 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 46.

The square root of 83899540 is about 9159.6692080009. The cubic root of 83899540 is about 437.7772544640. Note that the first 3 decimals are identical.

The spelling of 83899540 in words is "eighty-three million, eight hundred ninety-nine thousand, five hundred forty".