2391401880 has 288 divisors, whose sum is σ = 9377681040. Its totient is φ = 546497280.

The previous prime is 2391401879. The next prime is 2391401891. The reversal of 2391401880 is 881041932.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 473770 + ... + 478790.

Almost surely, 2^2391401880 is an apocalyptic number.

2391401880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2391401880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4688840520).

2391401880 is an abundant number, since it is smaller than the sum of its proper divisors (6986279160).

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

2391401880 is a wasteful number, since it uses less digits than its factorization.

2391401880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5061 (or 5038 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 2391401880 is about 48901.9619238329. The cubic root of 2391401880 is about 1337.2651356899.

The spelling of 2391401880 in words is "two billion, three hundred ninety-one million, four hundred one thousand, eight hundred eighty".