61230820 has 24 divisors (see below), whose sum is σ = 146954304. Its totient is φ = 20993376.

The previous prime is 61230817. The next prime is 61230823. The reversal of 61230820 is 2803216.

It is an interprime number because it is at equal distance from previous prime (61230817) and next prime (61230823).

It is a junction number, because it is equal to n+sod(n) for n = 61230791 and 61230800.

It is not an unprimeable number, because it can be changed into a prime (61230823) 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, 218542 + ... + 218821.

It is an arithmetic number, because the mean of its divisors is an integer number (6123096).

Almost surely, 2^61230820 is an apocalyptic number.

It is an amenable number.

61230820 is an abundant number, since it is smaller than the sum of its proper divisors (85723484).

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

61230820 is a wasteful number, since it uses less digits than its factorization.

61230820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437379 (or 437377 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 61230820 is about 7825.0124600540. The cubic root of 61230820 is about 394.1456082705.

The spelling of 61230820 in words is "sixty-one million, two hundred thirty thousand, eight hundred twenty".