378653972 has 6 divisors (see below), whose sum is σ = 662644458. Its totient is φ = 189326984.

The previous prime is 378653969. The next prime is 378653981. The reversal of 378653972 is 279356873.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 228493456 + 150160516 = 15116^2 + 12254^2 .

It is a super-2 number, since 2×378653972² = 286757661022753568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 378653972.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 47331743 + ... + 47331750.

It is an arithmetic number, because the mean of its divisors is an integer number (110440743).

Almost surely, 2^378653972 is an apocalyptic number.

It is an amenable number.

378653972 is a deficient number, since it is larger than the sum of its proper divisors (283990486).

378653972 is a wasteful number, since it uses less digits than its factorization.

378653972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94663497 (or 94663495 counting only the distinct ones).

The product of its digits is 1905120, while the sum is 50.

The square root of 378653972 is about 19459.0331722827. The cubic root of 378653972 is about 723.4594140311.

The spelling of 378653972 in words is "three hundred seventy-eight million, six hundred fifty-three thousand, nine hundred seventy-two".