2978012940 has 96 divisors (see below), whose sum is σ = 9592955904. Its totient is φ = 676166400.

The previous prime is 2978012903. The next prime is 2978012953. The reversal of 2978012940 is 492108792.

It is a super-2 number, since 2×2978012940² = 17737122141614887200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 2978012892 and 2978012901.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39942 + ... + 86898.

It is an arithmetic number, because the mean of its divisors is an integer number (99926624).

Almost surely, 2^2978012940 is an apocalyptic number.

2978012940 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 2978012940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4796477952).

2978012940 is an abundant number, since it is smaller than the sum of its proper divisors (6614942964).

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

2978012940 is a wasteful number, since it uses less digits than its factorization.

2978012940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47127 (or 47125 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 2978012940 is about 54571.1731594621. The cubic root of 2978012940 is about 1438.7175020205.

The spelling of 2978012940 in words is "two billion, nine hundred seventy-eight million, twelve thousand, nine hundred forty".