91377628 has 6 divisors (see below), whose sum is σ = 159910856. Its totient is φ = 45688812.

The previous prime is 91377613. The next prime is 91377653. The reversal of 91377628 is 82677319.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11422200 + ... + 11422207.

Almost surely, 2^91377628 is an apocalyptic number.

It is an amenable number.

91377628 is a deficient number, since it is larger than the sum of its proper divisors (68533228).

91377628 is a wasteful number, since it uses less digits than its factorization.

91377628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22844411 (or 22844409 counting only the distinct ones).

The product of its digits is 127008, while the sum is 43.

The square root of 91377628 is about 9559.1646078515. The cubic root of 91377628 is about 450.4154648615.

The spelling of 91377628 in words is "ninety-one million, three hundred seventy-seven thousand, six hundred twenty-eight".