83780428 has 12 divisors (see below), whose sum is σ = 146842192. Its totient is φ = 41825520.

The previous prime is 83780423. The next prime is 83780429. The reversal of 83780428 is 82408738.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (83780423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13200 + ... + 18487.

Almost surely, 2^83780428 is an apocalyptic number.

It is an amenable number.

83780428 is a deficient number, since it is larger than the sum of its proper divisors (63061764).

83780428 is a wasteful number, since it uses less digits than its factorization.

83780428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32352 (or 32350 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 40.

The square root of 83780428 is about 9153.1649171202. The cubic root of 83780428 is about 437.5699858652.

The spelling of 83780428 in words is "eighty-three million, seven hundred eighty thousand, four hundred twenty-eight".