91920338 has 8 divisors (see below), whose sum is σ = 140482188. Its totient is φ = 45092944.

The previous prime is 91920329. The next prime is 91920421. The reversal of 91920338 is 83302919.

It can be written as a sum of positive squares in 2 ways, for example, as 88868329 + 3052009 = 9427^2 + 1747^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 91920298 and 91920307.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 433481 + ... + 433692.

Almost surely, 2^91920338 is an apocalyptic number.

91920338 is a deficient number, since it is larger than the sum of its proper divisors (48561850).

91920338 is a wasteful number, since it uses less digits than its factorization.

91920338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 867228.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 91920338 is about 9587.5094784829. The cubic root of 91920338 is about 451.3054078264.

The spelling of 91920338 in words is "ninety-one million, nine hundred twenty thousand, three hundred thirty-eight".