90450402 has 32 divisors (see below), whose sum is σ = 209836032. Its totient is φ = 25456464.

The previous prime is 90450401. The next prime is 90450403. The reversal of 90450402 is 20405409.

It is an interprime number because it is at equal distance from previous prime (90450401) and next prime (90450403).

It is not an unprimeable number, because it can be changed into a prime (90450401) 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, 13258 + ... + 18885.

It is an arithmetic number, because the mean of its divisors is an integer number (6557376).

Almost surely, 2^90450402 is an apocalyptic number.

90450402 is an abundant number, since it is smaller than the sum of its proper divisors (119385630).

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

90450402 is a wasteful number, since it uses less digits than its factorization.

90450402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32222.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 90450402 is about 9510.5416249549. The cubic root of 90450402 is about 448.8867990741.

It can be divided in two parts, 90450 and 402, that multiplied together give a square (36360900 = 6030²).

The spelling of 90450402 in words is "ninety million, four hundred fifty thousand, four hundred two".