1378922625 has 96 divisors (see below), whose sum is σ = 2702269440. Its totient is φ = 673920000.

The previous prime is 1378922621. The next prime is 1378922639. The reversal of 1378922625 is 5262298731.

1378922625 is a `hidden beast` number, since 13 + 7 + 8 + 9 + 2 + 2 + 625 = 666.

It is not a de Polignac number, because 1378922625 - 2² = 1378922621 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378922621) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 661585 + ... + 663665.

It is an arithmetic number, because the mean of its divisors is an integer number (28148640).

Almost surely, 2^1378922625 is an apocalyptic number.

1378922625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1378922625 is a deficient number, since it is larger than the sum of its proper divisors (1323346815).

1378922625 is a wasteful number, since it uses less digits than its factorization.

1378922625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2152 (or 2139 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 1378922625 is about 37133.8474306124. The cubic root of 1378922625 is about 1113.0464764583.

The spelling of 1378922625 in words is "one billion, three hundred seventy-eight million, nine hundred twenty-two thousand, six hundred twenty-five".