401278040 has 16 divisors (see below), whose sum is σ = 902875680. Its totient is φ = 160511200.

The previous prime is 401278037. The next prime is 401278049. The reversal of 401278040 is 40872104.

It is a super-2 number, since 2×401278040² = 322048130772483200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401278049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5015936 + ... + 5016015.

It is an arithmetic number, because the mean of its divisors is an integer number (56429730).

Almost surely, 2^401278040 is an apocalyptic number.

401278040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

401278040 is an abundant number, since it is smaller than the sum of its proper divisors (501597640).

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

401278040 is a wasteful number, since it uses less digits than its factorization.

401278040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10031962 (or 10031958 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 401278040 is about 20031.9255190309. The cubic root of 401278040 is about 737.5901887214.

The spelling of 401278040 in words is "four hundred one million, two hundred seventy-eight thousand, forty".