2945989440 has 140 divisors (see below), whose sum is σ = 10479494916. Its totient is φ = 785590272.

The previous prime is 2945989393. The next prime is 2945989451. The reversal of 2945989440 is 449895492.

2945989440 is a `hidden beast` number, since 2 + 9 + 4 + 598 + 9 + 4 + 40 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1853819136 + 1092170304 = 43056^2 + 33048^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 30909 + ... + 82748.

Almost surely, 2^2945989440 is an apocalyptic number.

2945989440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2945989440 is an abundant number, since it is smaller than the sum of its proper divisors (7533505476).

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

2945989440 is a wasteful number, since it uses less digits than its factorization.

2945989440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113686 (or 113667 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 54.

The square root of 2945989440 is about 54276.9697017068. The cubic root of 2945989440 is about 1433.5419135193.

The spelling of 2945989440 in words is "two billion, nine hundred forty-five million, nine hundred eighty-nine thousand, four hundred forty".