1021623404 has 24 divisors (see below), whose sum is σ = 1832920656. Its totient is φ = 497952000.

The previous prime is 1021623403. The next prime is 1021623413. The reversal of 1021623404 is 4043261201.

It is a self number, because there is not a number n which added to its sum of digits gives 1021623404.

It is not an unprimeable number, because it can be changed into a prime (1021623403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 372719 + ... + 375449.

It is an arithmetic number, because the mean of its divisors is an integer number (76371694).

Almost surely, 2^1021623404 is an apocalyptic number.

It is an amenable number.

1021623404 is a deficient number, since it is larger than the sum of its proper divisors (811297252).

1021623404 is a wasteful number, since it uses less digits than its factorization.

1021623404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5057 (or 5055 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 1021623404 is about 31962.8441162547. The cubic root of 1021623404 is about 1007.1564641810.

Adding to 1021623404 its reverse (4043261201), we get a palindrome (5064884605).

The spelling of 1021623404 in words is "one billion, twenty-one million, six hundred twenty-three thousand, four hundred four".