83733978 has 16 divisors (see below), whose sum is σ = 171031680. Its totient is φ = 27317376.

The previous prime is 83733929. The next prime is 83733983. The reversal of 83733978 is 87933738.

It is a super-2 number, since 2×83733978² = 14022758143408968, which contains 22 as substring.

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, 148183 + ... + 148746.

It is an arithmetic number, because the mean of its divisors is an integer number (10689480).

Almost surely, 2^83733978 is an apocalyptic number.

83733978 is an abundant number, since it is smaller than the sum of its proper divisors (87297702).

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

83733978 is a wasteful number, since it uses less digits than its factorization.

83733978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296981.

The product of its digits is 762048, while the sum is 48.

The square root of 83733978 is about 9150.6271916192. The cubic root of 83733978 is about 437.4891042729.

The spelling of 83733978 in words is "eighty-three million, seven hundred thirty-three thousand, nine hundred seventy-eight".