378971540 has 24 divisors (see below), whose sum is σ = 798024192. Its totient is φ = 151172640.

The previous prime is 378971533. The next prime is 378971557. The reversal of 378971540 is 45179873.

It is a junction number, because it is equal to n+sod(n) for n = 378971491 and 378971500.

It is a congruent number.

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, 18476 + ... + 33155.

It is an arithmetic number, because the mean of its divisors is an integer number (33251008).

Almost surely, 2^378971540 is an apocalyptic number.

It is an amenable number.

378971540 is an abundant number, since it is smaller than the sum of its proper divisors (419052652).

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

378971540 is a wasteful number, since it uses less digits than its factorization.

378971540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52007 (or 52005 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 44.

The square root of 378971540 is about 19467.1913742070. The cubic root of 378971540 is about 723.6616068669.

The spelling of 378971540 in words is "three hundred seventy-eight million, nine hundred seventy-one thousand, five hundred forty".