561428972 has 48 divisors (see below), whose sum is σ = 1121847552. Its totient is φ = 243959040.

The previous prime is 561428957. The next prime is 561428977. The reversal of 561428972 is 279824165.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (561428977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54938 + ... + 64350.

It is an arithmetic number, because the mean of its divisors is an integer number (23371824).

Almost surely, 2^561428972 is an apocalyptic number.

561428972 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

561428972 is a deficient number, since it is larger than the sum of its proper divisors (560418580).

561428972 is a wasteful number, since it uses less digits than its factorization.

561428972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9498 (or 9496 counting only the distinct ones).

The product of its digits is 241920, while the sum is 44.

The square root of 561428972 is about 23694.4924402275. The cubic root of 561428972 is about 824.9575598615.

The spelling of 561428972 in words is "five hundred sixty-one million, four hundred twenty-eight thousand, nine hundred seventy-two".