2991320040 has 32 divisors (see below), whose sum is σ = 8973960480. Its totient is φ = 797685312.

The previous prime is 2991320023. The next prime is 2991320071. The reversal of 2991320040 is 400231992.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12463714 + ... + 12463953.

It is an arithmetic number, because the mean of its divisors is an integer number (280436265).

Almost surely, 2^2991320040 is an apocalyptic number.

2991320040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2991320040 is an abundant number, since it is smaller than the sum of its proper divisors (5982640440).

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

2991320040 is a wasteful number, since it uses less digits than its factorization.

2991320040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24927681 (or 24927677 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 2991320040 is about 54692.9615215706. The cubic root of 2991320040 is about 1440.8572634708.

The spelling of 2991320040 in words is "two billion, nine hundred ninety-one million, three hundred twenty thousand, forty".