90840477 has 16 divisors (see below), whose sum is σ = 149072000. Its totient is φ = 47915712.

The previous prime is 90840473. The next prime is 90840479. The reversal of 90840477 is 77404809.

It is not a de Polignac number, because 90840477 - 2² = 90840473 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90840473) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166102 + ... + 166647.

It is an arithmetic number, because the mean of its divisors is an integer number (9317000).

Almost surely, 2^90840477 is an apocalyptic number.

It is an amenable number.

90840477 is a deficient number, since it is larger than the sum of its proper divisors (58231523).

90840477 is a wasteful number, since it uses less digits than its factorization.

90840477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332772.

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 90840477 is about 9531.0270695240. The cubic root of 90840477 is about 449.5311610858.

The spelling of 90840477 in words is "ninety million, eight hundred forty thousand, four hundred seventy-seven".