1420620644 has 24 divisors (see below), whose sum is σ = 2589904800. Its totient is φ = 681235520.

The previous prime is 1420620583. The next prime is 1420620679. The reversal of 1420620644 is 4460260241.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63734 + ... + 83085.

It is an arithmetic number, because the mean of its divisors is an integer number (107912700).

Almost surely, 2^1420620644 is an apocalyptic number.

It is an amenable number.

1420620644 is a deficient number, since it is larger than the sum of its proper divisors (1169284156).

1420620644 is a wasteful number, since it uses less digits than its factorization.

1420620644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146923 (or 146921 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 1420620644 is about 37691.1215540212. The cubic root of 1420620644 is about 1124.1545962051.

Adding to 1420620644 its reverse (4460260241), we get a palindrome (5880880885).

The spelling of 1420620644 in words is "one billion, four hundred twenty million, six hundred twenty thousand, six hundred forty-four".