61840470 has 32 divisors (see below), whose sum is σ = 153537120. Its totient is φ = 15921920.

The previous prime is 61840469. The next prime is 61840477. The reversal of 61840470 is 7404816.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61840477) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34671 + ... + 36410.

It is an arithmetic number, because the mean of its divisors is an integer number (4798035).

Almost surely, 2^61840470 is an apocalyptic number.

61840470 is an abundant number, since it is smaller than the sum of its proper divisors (91696650).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61840470 is a wasteful number, since it uses less digits than its factorization.

61840470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71120.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 61840470 is about 7863.8711840925. The cubic root of 61840470 is about 395.4494057152.

The spelling of 61840470 in words is "sixty-one million, eight hundred forty thousand, four hundred seventy".