402134740 has 24 divisors (see below), whose sum is σ = 965123712. Its totient is φ = 137874720.

The previous prime is 402134731. The next prime is 402134749. The reversal of 402134740 is 47431204.

It is an interprime number because it is at equal distance from previous prime (402134731) and next prime (402134749).

It is a super-2 number, since 2×402134740² = 323424698229735200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402134749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1436056 + ... + 1436335.

It is an arithmetic number, because the mean of its divisors is an integer number (40213488).

Almost surely, 2^402134740 is an apocalyptic number.

It is an amenable number.

402134740 is an abundant number, since it is smaller than the sum of its proper divisors (562988972).

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

402134740 is a wasteful number, since it uses less digits than its factorization.

402134740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2872407 (or 2872405 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 402134740 is about 20053.2974844538. The cubic root of 402134740 is about 738.1147164402.

Adding to 402134740 its reverse (47431204), we get a palindrome (449565944).

The spelling of 402134740 in words is "four hundred two million, one hundred thirty-four thousand, seven hundred forty".