402054840 has 320 divisors, whose sum is σ = 1528956000. Its totient is φ = 93864960.

The previous prime is 402054827. The next prime is 402054853. The reversal of 402054840 is 48450204.

It is an interprime number because it is at equal distance from previous prime (402054827) and next prime (402054853).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1033366 + ... + 1033754.

Almost surely, 2^402054840 is an apocalyptic number.

402054840 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 402054840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (764478000).

402054840 is an abundant number, since it is smaller than the sum of its proper divisors (1126901160).

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

402054840 is a wasteful number, since it uses less digits than its factorization.

402054840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452 (or 439 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

The square root of 402054840 is about 20051.3051944256. The cubic root of 402054840 is about 738.0658279572.

The spelling of 402054840 in words is "four hundred two million, fifty-four thousand, eight hundred forty".