91880146 has 16 divisors (see below), whose sum is σ = 140297976. Its totient is φ = 45121536.

The previous prime is 91880141. The next prime is 91880179. The reversal of 91880146 is 64108819.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 53129521 + 38750625 = 7289^2 + 6225^2 .

It is a super-2 number, since 2×91880146² = 16883922457962632, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91880141) 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 7 ways as a sum of consecutive naturals, for example, 24850 + ... + 28306.

Almost surely, 2^91880146 is an apocalyptic number.

91880146 is a deficient number, since it is larger than the sum of its proper divisors (48417830).

91880146 is a wasteful number, since it uses less digits than its factorization.

91880146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3693.

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 91880146 is about 9585.4131887989. The cubic root of 91880146 is about 451.2396207484.

The spelling of 91880146 in words is "ninety-one million, eight hundred eighty thousand, one hundred forty-six".