402027840 has 448 divisors, whose sum is σ = 1560576000. Its totient is φ = 97044480.

The previous prime is 402027839. The next prime is 402027853. The reversal of 402027840 is 48720204.

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 63 ways as a sum of consecutive naturals, for example, 5088921 + ... + 5088999.

Almost surely, 2^402027840 is an apocalyptic number.

402027840 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 402027840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (780288000).

402027840 is an abundant number, since it is smaller than the sum of its proper divisors (1158548160).

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

402027840 is a wasteful number, since it uses less digits than its factorization.

402027840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155 (or 139 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 402027840 is about 20050.6319102416. The cubic root of 402027840 is about 738.0493059794.

The spelling of 402027840 in words is "four hundred two million, twenty-seven thousand, eight hundred forty".