83772078 has 16 divisors (see below), whose sum is σ = 180432336. Its totient is φ = 25776000.

The previous prime is 83772071. The next prime is 83772109. The reversal of 83772078 is 87027738.

It is a super-2 number, since 2×83772078² = 14035522104876168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83772071) 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, 536923 + ... + 537078.

It is an arithmetic number, because the mean of its divisors is an integer number (11277021).

Almost surely, 2^83772078 is an apocalyptic number.

83772078 is an abundant number, since it is smaller than the sum of its proper divisors (96660258).

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

83772078 is a wasteful number, since it uses less digits than its factorization.

83772078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1074019.

The product of its (nonzero) digits is 131712, while the sum is 42.

The square root of 83772078 is about 9152.7087793724. The cubic root of 83772078 is about 437.5554485368. Note that the first 3 decimals are identical.

The spelling of 83772078 in words is "eighty-three million, seven hundred seventy-two thousand, seventy-eight".