628780542 has 16 divisors (see below), whose sum is σ = 1354296720. Its totient is φ = 193470912.

The previous prime is 628780541. The next prime is 628780573. The reversal of 628780542 is 245087826.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 628780494 and 628780503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628780541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4030567 + ... + 4030722.

It is an arithmetic number, because the mean of its divisors is an integer number (84643545).

Almost surely, 2^628780542 is an apocalyptic number.

628780542 is an abundant number, since it is smaller than the sum of its proper divisors (725516178).

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

628780542 is a wasteful number, since it uses less digits than its factorization.

628780542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8061307.

The product of its (nonzero) digits is 215040, while the sum is 42.

The square root of 628780542 is about 25075.4968445293. The cubic root of 628780542 is about 856.7084119883.

The spelling of 628780542 in words is "six hundred twenty-eight million, seven hundred eighty thousand, five hundred forty-two".