402047420 has 24 divisors (see below), whose sum is σ = 863936304. Its totient is φ = 157078656.

The previous prime is 402047413. The next prime is 402047423. The reversal of 402047420 is 24740204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402047423) 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, 232889 + ... + 234608.

It is an arithmetic number, because the mean of its divisors is an integer number (35997346).

Almost surely, 2^402047420 is an apocalyptic number.

It is an amenable number.

402047420 is an abundant number, since it is smaller than the sum of its proper divisors (461888884).

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

402047420 is a wasteful number, since it uses less digits than its factorization.

402047420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467549 (or 467547 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 23.

The square root of 402047420 is about 20051.1201682101. The cubic root of 402047420 is about 738.0612875466.

Adding to 402047420 its reverse (24740204), we get a palindrome (426787624).

The spelling of 402047420 in words is "four hundred two million, forty-seven thousand, four hundred twenty".