402697020 has 192 divisors, whose sum is σ = 1371686400. Its totient is φ = 86999040.

The previous prime is 402696991. The next prime is 402697027. The reversal of 402697020 is 20796204.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402697027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 212236 + ... + 214124.

It is an arithmetic number, because the mean of its divisors is an integer number (7144200).

Almost surely, 2^402697020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402697020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (685843200).

402697020 is an abundant number, since it is smaller than the sum of its proper divisors (968989380).

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

402697020 is a wasteful number, since it uses less digits than its factorization.

402697020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1948 (or 1946 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 402697020 is about 20067.3122266037. The cubic root of 402697020 is about 738.4585761934.

The spelling of 402697020 in words is "four hundred two million, six hundred ninety-seven thousand, twenty".