1621478104 has 24 divisors (see below), whose sum is σ = 3178212660. Its totient is φ = 775487504.

The previous prime is 1621478101. The next prime is 1621478119. The reversal of 1621478104 is 4018741261.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1621478104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621478101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 187342 + ... + 195805.

Almost surely, 2^1621478104 is an apocalyptic number.

It is an amenable number.

1621478104 is a deficient number, since it is larger than the sum of its proper divisors (1556734556).

1621478104 is a wasteful number, since it uses less digits than its factorization.

1621478104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383199 (or 383172 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 1621478104 is about 40267.5813030780. The cubic root of 1621478104 is about 1174.8173801593.

The spelling of 1621478104 in words is "one billion, six hundred twenty-one million, four hundred seventy-eight thousand, one hundred four".