90403002 has 12 divisors (see below), whose sum is σ = 195873210. Its totient is φ = 30134328.

The previous prime is 90402989. The next prime is 90403009. The reversal of 90403002 is 20030409.

It can be written as a sum of positive squares in only one way, i.e., 52838361 + 37564641 = 7269^2 + 6129^2 .

It is a super-2 number, since 2×90403002² = 16345405541224008, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 5022389 = 90403002 / (9 + 0 + 4 + 0 + 3 + 0 + 0 + 2).

It is not an unprimeable number, because it can be changed into a prime (90403009) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2511177 + ... + 2511212.

Almost surely, 2^90403002 is an apocalyptic number.

90403002 is an abundant number, since it is smaller than the sum of its proper divisors (105470208).

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

90403002 is a wasteful number, since it uses less digits than its factorization.

90403002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5022397 (or 5022394 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 90403002 is about 9508.0493267547. The cubic root of 90403002 is about 448.8083732126.

The spelling of 90403002 in words is "ninety million, four hundred three thousand, two".