401538258 has 72 divisors (see below), whose sum is σ = 965777904. Its totient is φ = 120471120.

The previous prime is 401538253. The next prime is 401538271. The reversal of 401538258 is 852835104.

It is a happy number.

It is a super-2 number, since 2×401538258² = 322465945275349128, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (401538253) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 232185 + ... + 233907.

It is an arithmetic number, because the mean of its divisors is an integer number (13413582).

Almost surely, 2^401538258 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 401538258, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (482888952).

401538258 is an abundant number, since it is smaller than the sum of its proper divisors (564239646).

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

401538258 is a wasteful number, since it uses less digits than its factorization.

401538258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1860 (or 1846 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The square root of 401538258 is about 20038.4195484574. The cubic root of 401538258 is about 737.7495900604.

The spelling of 401538258 in words is "four hundred one million, five hundred thirty-eight thousand, two hundred fifty-eight".