1790397405 has 32 divisors (see below), whose sum is σ = 3285611520. Its totient is φ = 924073920.

The previous prime is 1790397391. The next prime is 1790397409. The reversal of 1790397405 is 5047930971.

It is not a de Polignac number, because 1790397405 - 2⁵ = 1790397373 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1790397409) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 209722 + ... + 218091.

It is an arithmetic number, because the mean of its divisors is an integer number (102675360).

Almost surely, 2^1790397405 is an apocalyptic number.

1790397405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1790397405 is a deficient number, since it is larger than the sum of its proper divisors (1495214115).

1790397405 is a wasteful number, since it uses less digits than its factorization.

1790397405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427858 (or 427852 counting only the distinct ones).

The product of its (nonzero) digits is 238140, while the sum is 45.

The square root of 1790397405 is about 42313.0878688852. The cubic root of 1790397405 is about 1214.2733957656.

The spelling of 1790397405 in words is "one billion, seven hundred ninety million, three hundred ninety-seven thousand, four hundred five".