61191424 has 36 divisors (see below), whose sum is σ = 139597024. Its totient is φ = 26224128.

The previous prime is 61191413. The next prime is 61191439. The reversal of 61191424 is 42419116.

It is a super-2 number, since 2×61191424² = 7488780742295552, which contains 22 as substring.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 61191392 and 61191401.

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 3 ways as a sum of consecutive naturals, for example, 15282 + ... + 18865.

Almost surely, 2^61191424 is an apocalyptic number.

61191424 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

61191424 is an abundant number, since it is smaller than the sum of its proper divisors (78405600).

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

61191424 is an equidigital number, since it uses as much as digits as its factorization.

61191424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34170 (or 34156 counting only the distinct ones).

The product of its digits is 1728, while the sum is 28.

The square root of 61191424 is about 7822.4947427275. The cubic root of 61191424 is about 394.0610588460.

The spelling of 61191424 in words is "sixty-one million, one hundred ninety-one thousand, four hundred twenty-four".