90199450 has 72 divisors (see below), whose sum is σ = 195479676. Its totient is φ = 30835200.

The previous prime is 90199409. The next prime is 90199471. The reversal of 90199450 is 5499109.

It can be written as a sum of positive squares in 6 ways, for example, as 62204769 + 27994681 = 7887^2 + 5291^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 102412 + ... + 103288.

Almost surely, 2^90199450 is an apocalyptic number.

90199450 is an abundant number, since it is smaller than the sum of its proper divisors (105280226).

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

90199450 is a wasteful number, since it uses less digits than its factorization.

90199450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 928 (or 912 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 37.

The square root of 90199450 is about 9497.3391010325. The cubic root of 90199450 is about 448.4712734420.

The spelling of 90199450 in words is "ninety million, one hundred ninety-nine thousand, four hundred fifty".