1388425450 has 24 divisors (see below), whose sum is σ = 2586348972. Its totient is φ = 554536320.

The previous prime is 1388425433. The next prime is 1388425459. The reversal of 1388425450 is 545248831.

It can be written as a sum of positive squares in 6 ways, for example, as 1141966849 + 246458601 = 33793^2 + 15699^2 .

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1388425459) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13342 + ... + 54358.

Almost surely, 2^1388425450 is an apocalyptic number.

1388425450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1388425450 is a deficient number, since it is larger than the sum of its proper divisors (1197923522).

1388425450 is a wasteful number, since it uses less digits than its factorization.

1388425450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41706 (or 41701 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 40.

The square root of 1388425450 is about 37261.5814210830. The cubic root of 1388425450 is about 1115.5974731600.

The spelling of 1388425450 in words is "one billion, three hundred eighty-eight million, four hundred twenty-five thousand, four hundred fifty".