1397722480 has 80 divisors (see below), whose sum is σ = 4051597824. Its totient is φ = 435651840.

The previous prime is 1397722411. The next prime is 1397722481. The reversal of 1397722480 is 842277931.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397722481) 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, 107292 + ... + 119611.

Almost surely, 2^1397722480 is an apocalyptic number.

1397722480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1397722480 is an abundant number, since it is smaller than the sum of its proper divisors (2653875344).

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

1397722480 is a wasteful number, since it uses less digits than its factorization.

1397722480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226934 (or 226928 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 1397722480 is about 37386.1268387085. The cubic root of 1397722480 is about 1118.0819851061.

The spelling of 1397722480 in words is "one billion, three hundred ninety-seven million, seven hundred twenty-two thousand, four hundred eighty".