1603697920 has 72 divisors (see below), whose sum is σ = 4190608800. Its totient is φ = 583157760.

The previous prime is 1603697911. The next prime is 1603697929. The reversal of 1603697920 is 297963061.

It is an interprime number because it is at equal distance from previous prime (1603697911) and next prime (1603697929).

It is a super-2 number, since 2×1603697920² = 5143694037224652800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1603697929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42870 + ... + 71029.

It is an arithmetic number, because the mean of its divisors is an integer number (58202900).

Almost surely, 2^1603697920 is an apocalyptic number.

1603697920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1603697920 is an abundant number, since it is smaller than the sum of its proper divisors (2586910880).

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

1603697920 is a wasteful number, since it uses less digits than its factorization.

1603697920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113931 (or 113917 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 43.

The square root of 1603697920 is about 40046.1973225923. The cubic root of 1603697920 is about 1170.5074673006.

The spelling of 1603697920 in words is "one billion, six hundred three million, six hundred ninety-seven thousand, nine hundred twenty".