61434890 has 16 divisors (see below), whose sum is σ = 120636000. Its totient is φ = 22339920.

The previous prime is 61434883. The next prime is 61434899. The reversal of 61434890 is 9843416.

It is a self number, because there is not a number n which added to its sum of digits gives 61434890.

It is not an unprimeable number, because it can be changed into a prime (61434899) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 279140 + ... + 279359.

It is an arithmetic number, because the mean of its divisors is an integer number (7539750).

Almost surely, 2^61434890 is an apocalyptic number.

61434890 is a deficient number, since it is larger than the sum of its proper divisors (59201110).

61434890 is a wasteful number, since it uses less digits than its factorization.

61434890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558517.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 61434890 is about 7838.0412093839. The cubic root of 61434890 is about 394.5829920551.

The spelling of 61434890 in words is "sixty-one million, four hundred thirty-four thousand, eight hundred ninety".