90945670 has 16 divisors (see below), whose sum is σ = 163921968. Its totient is φ = 36329440.

The previous prime is 90945623. The next prime is 90945689. The reversal of 90945670 is 7654909.

It is a super-2 number, since 2×90945670² = 16542229783497800, which contains 22 as substring.

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2265 + ... + 13675.

It is an arithmetic number, because the mean of its divisors is an integer number (10245123).

Almost surely, 2^90945670 is an apocalyptic number.

90945670 is a deficient number, since it is larger than the sum of its proper divisors (72976298).

90945670 is a wasteful number, since it uses less digits than its factorization.

90945670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12215.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 90945670 is about 9536.5439232460. The cubic root of 90945670 is about 449.7046127298.

The spelling of 90945670 in words is "ninety million, nine hundred forty-five thousand, six hundred seventy".