1620752426 has 16 divisors (see below), whose sum is σ = 2577687624. Its totient is φ = 761654784.

The previous prime is 1620752411. The next prime is 1620752461. The reversal of 1620752426 is 6242570261.

It can be written as a sum of positive squares in 4 ways, for example, as 1439823025 + 180929401 = 37945^2 + 13451^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7595 + ... + 57438.

Almost surely, 2^1620752426 is an apocalyptic number.

1620752426 is a deficient number, since it is larger than the sum of its proper divisors (956935198).

1620752426 is a wasteful number, since it uses less digits than its factorization.

1620752426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65785.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 1620752426 is about 40258.5695970436. The cubic root of 1620752426 is about 1174.6420943427.

The spelling of 1620752426 in words is "one billion, six hundred twenty million, seven hundred fifty-two thousand, four hundred twenty-six".