83870890 has 8 divisors (see below), whose sum is σ = 150967620. Its totient is φ = 33548352.

The previous prime is 83870881. The next prime is 83870893. The reversal of 83870890 is 9807838.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 82573569 + 1297321 = 9087^2 + 1139^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (83870893) 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, 4193535 + ... + 4193554.

Almost surely, 2^83870890 is an apocalyptic number.

83870890 is a deficient number, since it is larger than the sum of its proper divisors (67096730).

83870890 is a wasteful number, since it uses less digits than its factorization.

83870890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8387096.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 83870890 is about 9158.1051533601. The cubic root of 83870890 is about 437.7274180912.

The spelling of 83870890 in words is "eighty-three million, eight hundred seventy thousand, eight hundred ninety".