1620957394 has 16 divisors (see below), whose sum is σ = 2780385408. Its totient is φ = 694295712.

The previous prime is 1620957379. The next prime is 1620957433. The reversal of 1620957394 is 4937590261.

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, 7507 + ... + 57430.

It is an arithmetic number, because the mean of its divisors is an integer number (173774088).

Almost surely, 2^1620957394 is an apocalyptic number.

1620957394 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1620957394 is a deficient number, since it is larger than the sum of its proper divisors (1159428014).

1620957394 is a wasteful number, since it uses less digits than its factorization.

1620957394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66729.

The product of its (nonzero) digits is 408240, while the sum is 46.

The square root of 1620957394 is about 40261.1151609093. The cubic root of 1620957394 is about 1174.6916091829.

The spelling of 1620957394 in words is "one billion, six hundred twenty million, nine hundred fifty-seven thousand, three hundred ninety-four".