402134720 has 56 divisors (see below), whose sum is σ = 1031254224. Its totient is φ = 148478976.

The previous prime is 402134717. The next prime is 402134723. The reversal of 402134720 is 27431204.

It is an interprime number because it is at equal distance from previous prime (402134717) and next prime (402134723).

It is not an unprimeable number, because it can be changed into a prime (402134723) 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, 44174 + ... + 52493.

It is an arithmetic number, because the mean of its divisors is an integer number (18415254).

Almost surely, 2^402134720 is an apocalyptic number.

402134720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402134720 is an abundant number, since it is smaller than the sum of its proper divisors (629119504).

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

402134720 is a wasteful number, since it uses less digits than its factorization.

402134720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96697 (or 96687 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 402134720 is about 20053.2969857827. The cubic root of 402134720 is about 738.1147042036.

Adding to 402134720 its reverse (27431204), we get a palindrome (429565924).

The spelling of 402134720 in words is "four hundred two million, one hundred thirty-four thousand, seven hundred twenty".