1804972477 has 24 divisors (see below), whose sum is σ = 2302540992. Its totient is φ = 1399104000.

The previous prime is 1804972451. The next prime is 1804972577. The reversal of 1804972477 is 7742794081.

It is a happy number.

It is not a de Polignac number, because 1804972477 - 2²⁷ = 1670754749 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1804972477.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1804972447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 95352 + ... + 112702.

It is an arithmetic number, because the mean of its divisors is an integer number (95939208).

Almost surely, 2^1804972477 is an apocalyptic number.

It is an amenable number.

1804972477 is a deficient number, since it is larger than the sum of its proper divisors (497568515).

1804972477 is a wasteful number, since it uses less digits than its factorization.

1804972477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17569 (or 17562 counting only the distinct ones).

The product of its (nonzero) digits is 790272, while the sum is 49.

The square root of 1804972477 is about 42484.9676591615. The cubic root of 1804972477 is about 1217.5595029295.

The spelling of 1804972477 in words is "one billion, eight hundred four million, nine hundred seventy-two thousand, four hundred seventy-seven".