1393041720 has 64 divisors (see below), whose sum is σ = 4776145920. Its totient is φ = 318409344.

The previous prime is 1393041719. The next prime is 1393041721. The reversal of 1393041720 is 271403931.

It is an interprime number because it is at equal distance from previous prime (1393041719) and next prime (1393041721).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1393041721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 828352 + ... + 830031.

It is an arithmetic number, because the mean of its divisors is an integer number (74627280).

Almost surely, 2^1393041720 is an apocalyptic number.

1393041720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1393041720 is an abundant number, since it is smaller than the sum of its proper divisors (3383104200).

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

1393041720 is a wasteful number, since it uses less digits than its factorization.

1393041720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1658404 (or 1658400 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 1393041720 is about 37323.4741148248. The cubic root of 1393041720 is about 1116.8324937762.

The spelling of 1393041720 in words is "one billion, three hundred ninety-three million, forty-one thousand, seven hundred twenty".