90945478 has 16 divisors (see below), whose sum is σ = 155554560. Its totient is φ = 39505536.

The previous prime is 90945469. The next prime is 90945487. The reversal of 90945478 is 87454909.

It is an interprime number because it is at equal distance from previous prime (90945469) and next prime (90945487).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102438 + ... + 103321.

It is an arithmetic number, because the mean of its divisors is an integer number (9722160).

Almost surely, 2^90945478 is an apocalyptic number.

90945478 is a deficient number, since it is larger than the sum of its proper divisors (64609082).

90945478 is a wasteful number, since it uses less digits than its factorization.

90945478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205791.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 90945478 is about 9536.5338567008. The cubic root of 90945478 is about 449.7042962649.

The spelling of 90945478 in words is "ninety million, nine hundred forty-five thousand, four hundred seventy-eight".