30390280256644 has 81 divisors (see below), whose sum is σ = 68003291258469. Its totient is φ = 11840038166880.

The previous prime is 30390280256639. The next prime is 30390280256657. The reversal of 30390280256644 is 44665208209303.

The square root of 30390280256644 is 5512738.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 2280009400900 + 28110270855744 = 1509970^2 + 5301912^2 .

It is a super-2 number, since 2×30390280256644² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30390280256591 and 30390280256600.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 848943754 + ... + 848979550.

Almost surely, 2^{30390280256644} is an apocalyptic number.

30390280256644 is the 5512738-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30390280256644

30390280256644 is an abundant number, since it is smaller than the sum of its proper divisors (37613011001825).

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

30390280256644 is an frugal number, since it uses more digits than its factorization.

30390280256644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71634 (or 35817 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 52.

The spelling of 30390280256644 in words is "thirty trillion, three hundred ninety billion, two hundred eighty million, two hundred fifty-six thousand, six hundred forty-four".