1628340756 has 72 divisors (see below), whose sum is σ = 4513896576. Its totient is φ = 455333760.

The previous prime is 1628340743. The next prime is 1628340757. The reversal of 1628340756 is 6570438261.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1628340757) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1825 + ... + 57096.

It is an arithmetic number, because the mean of its divisors is an integer number (62693008).

Almost surely, 2^1628340756 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1628340756, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2256948288).

1628340756 is an abundant number, since it is smaller than the sum of its proper divisors (2885555820).

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

1628340756 is a wasteful number, since it uses less digits than its factorization.

1628340756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58989 (or 58980 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 42.

The square root of 1628340756 is about 40352.7044446838. The cubic root of 1628340756 is about 1176.4724575572.

The spelling of 1628340756 in words is "one billion, six hundred twenty-eight million, three hundred forty thousand, seven hundred fifty-six".