1399533750 has 120 divisors (see below), whose sum is σ = 3912397632. Its totient is φ = 361080000.

The previous prime is 1399533727. The next prime is 1399533763. The reversal of 1399533750 is 573359931.

1399533750 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 1399533696 and 1399533705.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 346744 + ... + 350756.

Almost surely, 2^1399533750 is an apocalyptic number.

1399533750 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1399533750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1956198816).

1399533750 is an abundant number, since it is smaller than the sum of its proper divisors (2512863882).

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

1399533750 is a wasteful number, since it uses less digits than its factorization.

1399533750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4072 (or 4054 counting only the distinct ones).

The product of its (nonzero) digits is 382725, while the sum is 45.

The square root of 1399533750 is about 37410.3428212039. The cubic root of 1399533750 is about 1118.5647405022.

The spelling of 1399533750 in words is "one billion, three hundred ninety-nine million, five hundred thirty-three thousand, seven hundred fifty".