90292402 has 4 divisors (see below), whose sum is σ = 135438606. Its totient is φ = 45146200.

The previous prime is 90292379. The next prime is 90292409. The reversal of 90292402 is 20429209.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20429209 = 1283 ⋅15923.

It can be written as a sum of positive squares in only one way, i.e., 54184321 + 36108081 = 7361^2 + 6009^2 .

It is not an unprimeable number, because it can be changed into a prime (90292409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22573099 + ... + 22573102.

Almost surely, 2^90292402 is an apocalyptic number.

90292402 is a deficient number, since it is larger than the sum of its proper divisors (45146204).

90292402 is a wasteful number, since it uses less digits than its factorization.

90292402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45146203.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 90292402 is about 9502.2314221450. The cubic root of 90292402 is about 448.6252728679.

The spelling of 90292402 in words is "ninety million, two hundred ninety-two thousand, four hundred two".