840451400 has 24 divisors (see below), whose sum is σ = 1954049970. Its totient is φ = 336180480.

The previous prime is 840451373. The next prime is 840451421. The reversal of 840451400 is 4154048.

It can be written as a sum of positive squares in 3 ways, for example, as 553284484 + 287166916 = 23522^2 + 16946^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 840451400.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2100929 + ... + 2101328.

Almost surely, 2^840451400 is an apocalyptic number.

It is an amenable number.

840451400 is an abundant number, since it is smaller than the sum of its proper divisors (1113598570).

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

840451400 is a wasteful number, since it uses less digits than its factorization.

840451400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4202273 (or 4202264 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 26.

The square root of 840451400 is about 28990.5398362983. The cubic root of 840451400 is about 943.7077790565.

The spelling of 840451400 in words is "eight hundred forty million, four hundred fifty-one thousand, four hundred".