402011040 has 96 divisors (see below), whose sum is σ = 1270878336. Its totient is φ = 106818560.

The previous prime is 402011033. The next prime is 402011041. The reversal of 402011040 is 40110204.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×402011040² = 323225752563763200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (402011041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147934 + ... + 150626.

It is an arithmetic number, because the mean of its divisors is an integer number (13238316).

Almost surely, 2^402011040 is an apocalyptic number.

402011040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402011040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (635439168).

402011040 is an abundant number, since it is smaller than the sum of its proper divisors (868867296).

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

402011040 is a wasteful number, since it uses less digits than its factorization.

402011040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3022 (or 3014 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 402011040 is about 20050.2129664500. The cubic root of 402011040 is about 738.0390252643.

Adding to 402011040 its reverse (40110204), we get a palindrome (442121244).

The spelling of 402011040 in words is "four hundred two million, eleven thousand, forty".