2978481940 has 48 divisors (see below), whose sum is σ = 7568854272. Its totient is φ = 961122816.

The previous prime is 2978481929. The next prime is 2978481949. The reversal of 2978481940 is 491848792.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2978481949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 623352 + ... + 628111.

It is an arithmetic number, because the mean of its divisors is an integer number (157684464).

Almost surely, 2^2978481940 is an apocalyptic number.

2978481940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2978481940 is an abundant number, since it is smaller than the sum of its proper divisors (4590372332).

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

2978481940 is a wasteful number, since it uses less digits than its factorization.

2978481940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1251496 (or 1251494 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 52.

The square root of 2978481940 is about 54575.4701308198. The cubic root of 2978481940 is about 1438.7930247603.

The spelling of 2978481940 in words is "two billion, nine hundred seventy-eight million, four hundred eighty-one thousand, nine hundred forty".