61620270 has 16 divisors (see below), whose sum is σ = 147888720. Its totient is φ = 16432064.

The previous prime is 61620269. The next prime is 61620341. The reversal of 61620270 is 7202616.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 61620270.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1026975 + ... + 1027034.

It is an arithmetic number, because the mean of its divisors is an integer number (9243045).

Almost surely, 2^61620270 is an apocalyptic number.

61620270 is an abundant number, since it is smaller than the sum of its proper divisors (86268450).

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

61620270 is a wasteful number, since it uses less digits than its factorization.

61620270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2054019.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 61620270 is about 7849.8579604984. The cubic root of 61620270 is about 394.9794787181.

Adding to 61620270 its reverse (7202616), we get a palindrome (68822886).

The spelling of 61620270 in words is "sixty-one million, six hundred twenty thousand, two hundred seventy".