61864442 has 8 divisors (see below), whose sum is σ = 93012276. Its totient is φ = 30860352.

The previous prime is 61864427. The next prime is 61864463. The reversal of 61864442 is 24446816.

It can be written as a sum of positive squares in 2 ways, for example, as 61481281 + 383161 = 7841^2 + 619^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×61864442³ (a number of 24 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34853 + ... + 36584.

Almost surely, 2^61864442 is an apocalyptic number.

61864442 is a deficient number, since it is larger than the sum of its proper divisors (31147834).

61864442 is a wasteful number, since it uses less digits than its factorization.

61864442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71872.

The product of its digits is 36864, while the sum is 35.

The square root of 61864442 is about 7865.3952221106. The cubic root of 61864442 is about 395.5004967914.

The spelling of 61864442 in words is "sixty-one million, eight hundred sixty-four thousand, four hundred forty-two".