1378406372 has 12 divisors (see below), whose sum is σ = 2756812800. Its totient is φ = 590745576.

The previous prime is 1378406363. The next prime is 1378406377. The reversal of 1378406372 is 2736048731.

1378406372 is an admirable number.

It is a super-3 number, since 3×1378406372³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1378406377) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24614372 + ... + 24614427.

It is an arithmetic number, because the mean of its divisors is an integer number (229734400).

Almost surely, 2^1378406372 is an apocalyptic number.

It is an amenable number.

1378406372 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1378406372 is a wasteful number, since it uses less digits than its factorization.

1378406372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49228810 (or 49228808 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 41.

The square root of 1378406372 is about 37126.8955341003. The cubic root of 1378406372 is about 1112.9075551254.

The spelling of 1378406372 in words is "one billion, three hundred seventy-eight million, four hundred six thousand, three hundred seventy-two".