402181320 has 32 divisors (see below), whose sum is σ = 1206544320. Its totient is φ = 107248320.

The previous prime is 402181277. The next prime is 402181327. The reversal of 402181320 is 23181204.

It is not an unprimeable number, because it can be changed into a prime (402181327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1675636 + ... + 1675875.

It is an arithmetic number, because the mean of its divisors is an integer number (37704510).

Almost surely, 2^402181320 is an apocalyptic number.

402181320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402181320 is an abundant number, since it is smaller than the sum of its proper divisors (804363000).

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

402181320 is a wasteful number, since it uses less digits than its factorization.

402181320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3351525 (or 3351521 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 402181320 is about 20054.4588558256. The cubic root of 402181320 is about 738.1432143976.

The spelling of 402181320 in words is "four hundred two million, one hundred eighty-one thousand, three hundred twenty".