2400090991 has 8 divisors (see below), whose sum is σ = 2554176240. Its totient is φ = 2247439488.

The previous prime is 2400090989. The next prime is 2400091013. The reversal of 2400090991 is 1990900042.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2400090991 - 2¹ = 2400090989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2400090941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 354981 + ... + 361678.

It is an arithmetic number, because the mean of its divisors is an integer number (319272030).

Almost surely, 2^2400090991 is an apocalyptic number.

2400090991 is a deficient number, since it is larger than the sum of its proper divisors (154085249).

2400090991 is a wasteful number, since it uses less digits than its factorization.

2400090991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716873.

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 2400090991 is about 48990.7235198665. The cubic root of 2400090991 is about 1338.8828200543.

The spelling of 2400090991 in words is "two billion, four hundred million, ninety thousand, nine hundred ninety-one".