1402155720 has 288 divisors, whose sum is σ = 5354256960. Its totient is φ = 311731200.

The previous prime is 1402155701. The next prime is 1402155731. The reversal of 1402155720 is 275512041.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 4235955 + ... + 4236285.

It is an arithmetic number, because the mean of its divisors is an integer number (18591170).

Almost surely, 2^1402155720 is an apocalyptic number.

1402155720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1402155720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2677128480).

1402155720 is an abundant number, since it is smaller than the sum of its proper divisors (3952101240).

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

1402155720 is a wasteful number, since it uses less digits than its factorization.

1402155720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437 (or 389 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 1402155720 is about 37445.3698072272. The cubic root of 1402155720 is about 1119.2628333672.

Adding to 1402155720 its reverse (275512041), we get a palindrome (1677667761).

The spelling of 1402155720 in words is "one billion, four hundred two million, one hundred fifty-five thousand, seven hundred twenty".