78141290 has 16 divisors (see below), whose sum is σ = 140790312. Its totient is φ = 31226304.

The previous prime is 78141269. The next prime is 78141313. The reversal of 78141290 is 9214187.

It can be written as a sum of positive squares in 4 ways, for example, as 70845889 + 7295401 = 8417^2 + 2701^2 .

It is a super-2 number, since 2×78141290² = 12212122405728200, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9212 + ... + 15528.

Almost surely, 2^78141290 is an apocalyptic number.

78141290 is a deficient number, since it is larger than the sum of its proper divisors (62649022).

78141290 is a wasteful number, since it uses less digits than its factorization.

78141290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7561.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 78141290 is about 8839.7562183581. The cubic root of 78141290 is about 427.5236971463.

The spelling of 78141290 in words is "seventy-eight million, one hundred forty-one thousand, two hundred ninety".