91148390 has 64 divisors (see below), whose sum is σ = 183104064. Its totient is φ = 32514048.

The previous prime is 91148389. The next prime is 91148419. The reversal of 91148390 is 9384119.

It is a self number, because there is not a number n which added to its sum of digits gives 91148390.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 270302 + ... + 270638.

It is an arithmetic number, because the mean of its divisors is an integer number (2861001).

Almost surely, 2^91148390 is an apocalyptic number.

91148390 is an abundant number, since it is smaller than the sum of its proper divisors (91955674).

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

91148390 is a wasteful number, since it uses less digits than its factorization.

91148390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 91148390 is about 9547.1665953832. The cubic root of 91148390 is about 450.0384987638.

The spelling of 91148390 in words is "ninety-one million, one hundred forty-eight thousand, three hundred ninety".