61277290 has 32 divisors (see below), whose sum is σ = 119076480. Its totient is φ = 22634304.

The previous prime is 61277287. The next prime is 61277303. The reversal of 61277290 is 9277216.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2077 + ... + 11263.

It is an arithmetic number, because the mean of its divisors is an integer number (3721140).

Almost surely, 2^61277290 is an apocalyptic number.

61277290 is a deficient number, since it is larger than the sum of its proper divisors (57799190).

61277290 is a wasteful number, since it uses less digits than its factorization.

61277290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9246.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 61277290 is about 7827.9812212345. The cubic root of 61277290 is about 394.2452929002.

The spelling of 61277290 in words is "sixty-one million, two hundred seventy-seven thousand, two hundred ninety".