1428624 has 40 divisors (see below), whose sum is σ = 4101920. Its totient is φ = 476064.

The previous prime is 1428613. The next prime is 1428631. The reversal of 1428624 is 4268241.

1428624 is a `hidden beast` number, since 14 + 28 + 624 = 666.

It is a super-3 number, since 3×1428624³ = 8747321318333263872, which contains 333 as substring.

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

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1222 + ... + 2085.

It is an arithmetic number, because the mean of its divisors is an integer number (102548).

2^1428624 is an apocalyptic number.

It is an amenable number.

1428624 is an abundant number, since it is smaller than the sum of its proper divisors (2673296).

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

1428624 is a wasteful number, since it uses less digits than its factorization.

1428624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3324 (or 3312 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

The square root of 1428624 is about 1195.2506013385. The cubic root of 1428624 is about 112.6261695581.

The spelling of 1428624 in words is "one million, four hundred twenty-eight thousand, six hundred twenty-four".