91263402 has 64 divisors (see below), whose sum is σ = 213269760. Its totient is φ = 28873152.

The previous prime is 91263401. The next prime is 91263413. The reversal of 91263402 is 20436219.

It is a super-2 number, since 2×91263402² = 16658017089227208, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (91263401) 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, 244488 + ... + 244860.

It is an arithmetic number, because the mean of its divisors is an integer number (3332340).

Almost surely, 2^91263402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91263402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106634880).

91263402 is an abundant number, since it is smaller than the sum of its proper divisors (122006358).

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

91263402 is a wasteful number, since it uses less digits than its factorization.

91263402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 604 (or 598 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 91263402 is about 9553.1880542571. The cubic root of 91263402 is about 450.2277069795.

The spelling of 91263402 in words is "ninety-one million, two hundred sixty-three thousand, four hundred two".