402260991 has 24 divisors (see below), whose sum is σ = 608573952. Its totient is φ = 235923600.

The previous prime is 402260981. The next prime is 402261029. The reversal of 402260991 is 199062204.

It is not a de Polignac number, because 402260991 - 2⁵ = 402260959 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402260941) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6621 + ... + 29126.

It is an arithmetic number, because the mean of its divisors is an integer number (25357248).

Almost surely, 2^402260991 is an apocalyptic number.

402260991 is a deficient number, since it is larger than the sum of its proper divisors (206312961).

402260991 is a wasteful number, since it uses less digits than its factorization.

402260991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35803 (or 35792 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 402260991 is about 20056.4451237003. The cubic root of 402260991 is about 738.1919525515.

The spelling of 402260991 in words is "four hundred two million, two hundred sixty thousand, nine hundred ninety-one".