745857840 has 480 divisors, whose sum is σ = 2980094976. Its totient is φ = 150958080.

The previous prime is 745857839. The next prime is 745857883. The reversal of 745857840 is 48758547.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 745857840.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 10505005 + ... + 10505075.

Almost surely, 2^745857840 is an apocalyptic number.

745857840 is a gapful number since it is divisible by the number (70) 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 745857840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1490047488).

745857840 is an abundant number, since it is smaller than the sum of its proper divisors (2234237136).

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

745857840 is a wasteful number, since it uses less digits than its factorization.

745857840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157 (or 138 counting only the distinct ones).

The product of its (nonzero) digits is 1254400, while the sum is 48.

The square root of 745857840 is about 27310.3980198019. The cubic root of 745857840 is about 906.8845845376.

The spelling of 745857840 in words is "seven hundred forty-five million, eight hundred fifty-seven thousand, eight hundred forty".