405051402 has 64 divisors (see below), whose sum is σ = 947036160. Its totient is φ = 113102784.

The previous prime is 405051359. The next prime is 405051433. The reversal of 405051402 is 204150504.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 552228 + ... + 552960.

It is an arithmetic number, because the mean of its divisors is an integer number (14797440).

Almost surely, 2^405051402 is an apocalyptic number.

405051402 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 405051402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (473518080).

405051402 is an abundant number, since it is smaller than the sum of its proper divisors (541984758).

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

405051402 is a wasteful number, since it uses less digits than its factorization.

405051402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1027.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 405051402 is about 20125.8888499365. Note that the first 4 decimals coincide. The cubic root of 405051402 is about 739.8949217733.

The spelling of 405051402 in words is "four hundred five million, fifty-one thousand, four hundred two".