401407002 has 20 divisors (see below), whose sum is σ = 899449386. Its totient is φ = 133802280.

The previous prime is 401406959. The next prime is 401407057. The reversal of 401407002 is 200704104.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 399560121 + 1846881 = 19989^2 + 1359^2 .

It is a super-2 number, since 2×401407002² = 322255162509256008, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1238749 + ... + 1239072.

Almost surely, 2^401407002 is an apocalyptic number.

401407002 is an abundant number, since it is smaller than the sum of its proper divisors (498042384).

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

401407002 is a wasteful number, since it uses less digits than its factorization.

401407002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2477835 (or 2477826 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 401407002 is about 20035.1441721790. The cubic root of 401407002 is about 737.6691953854.

The spelling of 401407002 in words is "four hundred one million, four hundred seven thousand, two".