401425290 has 96 divisors (see below), whose sum is σ = 1196073216. Its totient is φ = 91503360.

The previous prime is 401425289. The next prime is 401425291. The reversal of 401425290 is 92524104.

401425290 is a `hidden beast` number, since 401 + 4 + 252 + 9 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (401425289) and next prime (401425291).

It is a super-2 number, since 2×401425290² = 322284526903168200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401425291) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 327619 + ... + 328841.

It is an arithmetic number, because the mean of its divisors is an integer number (12459096).

Almost surely, 2^401425290 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 401425290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (598036608).

401425290 is an abundant number, since it is smaller than the sum of its proper divisors (794647926).

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

401425290 is a wasteful number, since it uses less digits than its factorization.

401425290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1764 (or 1761 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 401425290 is about 20035.6005649943. The cubic root of 401425290 is about 737.6803978883.

Adding to 401425290 its reverse (92524104), we get a palindrome (493949394).

The spelling of 401425290 in words is "four hundred one million, four hundred twenty-five thousand, two hundred ninety".