83720190 has 16 divisors (see below), whose sum is σ = 200928528. Its totient is φ = 22325376.

The previous prime is 83720179. The next prime is 83720227. The reversal of 83720190 is 9102738.

It is a happy number.

It is a super-2 number, since 2×83720190² = 14018140427272200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 2790673 = 83720190 / (8 + 3 + 7 + 2 + 0 + 1 + 9 + 0).

It is a congruent number.

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, 1395307 + ... + 1395366.

It is an arithmetic number, because the mean of its divisors is an integer number (12558033).

Almost surely, 2^83720190 is an apocalyptic number.

83720190 is an abundant number, since it is smaller than the sum of its proper divisors (117208338).

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

83720190 is a wasteful number, since it uses less digits than its factorization.

83720190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2790683.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 83720190 is about 9149.8737696211. The cubic root of 83720190 is about 437.4650900036.

The spelling of 83720190 in words is "eighty-three million, seven hundred twenty thousand, one hundred ninety".