83780790 has 32 divisors (see below), whose sum is σ = 205355520. Its totient is φ = 21865824.

The previous prime is 83780761. The next prime is 83780821. The reversal of 83780790 is 9708738.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28300 + ... + 31119.

It is an arithmetic number, because the mean of its divisors is an integer number (6417360).

Almost surely, 2^83780790 is an apocalyptic number.

83780790 is an abundant number, since it is smaller than the sum of its proper divisors (121574730).

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

83780790 is a wasteful number, since it uses less digits than its factorization.

83780790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59476.

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 83780790 is about 9153.1846916797. The cubic root of 83780790 is about 437.5706160844.

The spelling of 83780790 in words is "eighty-three million, seven hundred eighty thousand, seven hundred ninety".