401256030 has 64 divisors (see below), whose sum is σ = 1113896448. Its totient is φ = 90606720.

The previous prime is 401256019. The next prime is 401256043. The reversal of 401256030 is 30652104.

It is a happy number.

It is a super-2 number, since 2×401256030² = 322012803222721800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 401255988 and 401256006.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5920 + ... + 28940.

It is an arithmetic number, because the mean of its divisors is an integer number (17404632).

Almost surely, 2^401256030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 401256030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (556948224).

401256030 is an abundant number, since it is smaller than the sum of its proper divisors (712640418).

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

401256030 is a wasteful number, since it uses less digits than its factorization.

401256030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23121.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 401256030 is about 20031.3761384484. The cubic root of 401256030 is about 737.5767029291.

The spelling of 401256030 in words is "four hundred one million, two hundred fifty-six thousand, thirty".