40401252 has 36 divisors (see below), whose sum is σ = 104504400. Its totient is φ = 13153392.

The previous prime is 40401241. The next prime is 40401259. The reversal of 40401252 is 25210404.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×40401252² = 3264522326335008, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (40401259) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11502 + ... + 14597.

It is an arithmetic number, because the mean of its divisors is an integer number (2902900).

Almost surely, 2^40401252 is an apocalyptic number.

It is an amenable number.

40401252 is an abundant number, since it is smaller than the sum of its proper divisors (64103148).

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

40401252 is a wasteful number, since it uses less digits than its factorization.

40401252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26152 (or 26147 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 40401252 is about 6356.1979201406. The cubic root of 40401252 is about 343.1349388464.

Adding to 40401252 its reverse (25210404), we get a palindrome (65611656).

The spelling of 40401252 in words is "forty million, four hundred one thousand, two hundred fifty-two".