1904630 has 72 divisors (see below), whose sum is σ = 4506192. Its totient is φ = 576576.

The previous prime is 1904621. The next prime is 1904647. The reversal of 1904630 is 364091.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a junction number, because it is equal to n+sod(n) for n = 1904596 and 1904605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 82799 + ... + 82821.

It is an arithmetic number, because the mean of its divisors is an integer number (62586).

2^1904630 is an apocalyptic number.

1904630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1904630 is the 1127-th pentagonal number.

1904630 is an abundant number, since it is smaller than the sum of its proper divisors (2601562).

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

1904630 is a wasteful number, since it uses less digits than its factorization.

1904630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70 (or 50 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 1904630 is about 1380.0833308174. The cubic root of 1904630 is about 123.9567573810.

The spelling of 1904630 in words is "one million, nine hundred four thousand, six hundred thirty".