90280477 has 8 divisors (see below), whose sum is σ = 103236992. Its totient is φ = 77338800.

The previous prime is 90280471. The next prime is 90280493. The reversal of 90280477 is 77408209.

It is a happy number.

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

It is not a de Polignac number, because 90280477 - 2³ = 90280469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90280471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17227 + ... + 21847.

It is an arithmetic number, because the mean of its divisors is an integer number (12904624).

Almost surely, 2^90280477 is an apocalyptic number.

It is an amenable number.

90280477 is a deficient number, since it is larger than the sum of its proper divisors (12956515).

90280477 is a wasteful number, since it uses less digits than its factorization.

90280477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7419.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 90280477 is about 9501.6039172342. The cubic root of 90280477 is about 448.6055218818.

The spelling of 90280477 in words is "ninety million, two hundred eighty thousand, four hundred seventy-seven".