1388292480 has 128 divisors (see below), whose sum is σ = 4916930400. Its totient is φ = 370206720.

The previous prime is 1388292469. The next prime is 1388292481. The reversal of 1388292480 is 842928831.

1388292480 is a `hidden beast` number, since 1 + 3 + 8 + 82 + 92 + 480 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

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 (1388292481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22891 + ... + 57450.

Almost surely, 2^1388292480 is an apocalyptic number.

1388292480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1388292480 is an abundant number, since it is smaller than the sum of its proper divisors (3528637920).

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

1388292480 is an equidigital number, since it uses as much as digits as its factorization.

1388292480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80369 (or 80351 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The square root of 1388292480 is about 37259.7971008968. The cubic root of 1388292480 is about 1115.5618583006.

The spelling of 1388292480 in words is "one billion, three hundred eighty-eight million, two hundred ninety-two thousand, four hundred eighty".