378981540 has 72 divisors (see below), whose sum is σ = 1313807040. Its totient is φ = 86624064.

The previous prime is 378981529. The next prime is 378981571. The reversal of 378981540 is 45189873.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 149130 + ... + 151649.

It is an arithmetic number, because the mean of its divisors is an integer number (18247320).

Almost surely, 2^378981540 is an apocalyptic number.

378981540 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

378981540 is an abundant number, since it is smaller than the sum of its proper divisors (934825500).

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

378981540 is a wasteful number, since it uses less digits than its factorization.

378981540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300801 (or 300796 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 378981540 is about 19467.4482149048. The cubic root of 378981540 is about 723.6679719468.

The spelling of 378981540 in words is "three hundred seventy-eight million, nine hundred eighty-one thousand, five hundred forty".