1597691004 has 96 divisors (see below), whose sum is σ = 4616242176. Its totient is φ = 418798080.

The previous prime is 1597690979. The next prime is 1597691033. The reversal of 1597691004 is 4001967951.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 177984 + ... + 186744.

It is an arithmetic number, because the mean of its divisors is an integer number (48085856).

Almost surely, 2^1597691004 is an apocalyptic number.

1597691004 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1597691004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2308121088).

1597691004 is an abundant number, since it is smaller than the sum of its proper divisors (3018551172).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1597691004 is a wasteful number, since it uses less digits than its factorization.

1597691004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8955 (or 8953 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 42.

The square root of 1597691004 is about 39971.1271294668. The cubic root of 1597691004 is about 1169.0441956487.

The spelling of 1597691004 in words is "one billion, five hundred ninety-seven million, six hundred ninety-one thousand, four".