91252770 has 64 divisors (see below), whose sum is σ = 265026816. Its totient is φ = 19630080.

The previous prime is 91252741. The next prime is 91252771. The reversal of 91252770 is 7725219.

It is not an unprimeable number, because it can be changed into a prime (91252771) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9211 + ... + 16350.

It is an arithmetic number, because the mean of its divisors is an integer number (4141044).

Almost surely, 2^91252770 is an apocalyptic number.

91252770 is an abundant number, since it is smaller than the sum of its proper divisors (173774046).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91252770 is a wasteful number, since it uses less digits than its factorization.

91252770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25595.

The product of its (nonzero) digits is 8820, while the sum is 33.

The square root of 91252770 is about 9552.6315745977. The cubic root of 91252770 is about 450.2102227643.

Adding to 91252770 its reverse (7725219), we get a palindrome (98977989).

The spelling of 91252770 in words is "ninety-one million, two hundred fifty-two thousand, seven hundred seventy".