1616855428 has 6 divisors (see below), whose sum is σ = 2829497006. Its totient is φ = 808427712.

The previous prime is 1616855351. The next prime is 1616855441. The reversal of 1616855428 is 8245586161.

It can be written as a sum of positive squares in only one way, i.e., 1227661444 + 389193984 = 35038^2 + 19728^2 .

It is a super-2 number, since 2×1616855428² = 5228442950106126368, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202106925 + ... + 202106932.

Almost surely, 2^1616855428 is an apocalyptic number.

It is an amenable number.

1616855428 is a deficient number, since it is larger than the sum of its proper divisors (1212641578).

1616855428 is a wasteful number, since it uses less digits than its factorization.

1616855428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404213861 (or 404213859 counting only the distinct ones).

The product of its digits is 460800, while the sum is 46.

The square root of 1616855428 is about 40210.1408602357. The cubic root of 1616855428 is about 1173.6998875913.

The spelling of 1616855428 in words is "one billion, six hundred sixteen million, eight hundred fifty-five thousand, four hundred twenty-eight".