61436340 has 96 divisors (see below), whose sum is σ = 218453760. Its totient is φ = 14041728.

The previous prime is 61436321. The next prime is 61436357. The reversal of 61436340 is 4363416.

61436340 is a `hidden beast` number, since 614 + 3 + 6 + 3 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4347 + ... + 11906.

It is an arithmetic number, because the mean of its divisors is an integer number (2275560).

Almost surely, 2^61436340 is an apocalyptic number.

61436340 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61436340 is an abundant number, since it is smaller than the sum of its proper divisors (157017420).

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

61436340 is a wasteful number, since it uses less digits than its factorization.

61436340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16278 (or 16270 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 61436340 is about 7838.1337064380. The cubic root of 61436340 is about 394.5860963760.

Adding to 61436340 its reverse (4363416), we get a palindrome (65799756).

It can be divided in two parts, 61436 and 340, that added together give a triangular number (61776 = T₃₅₁).

The spelling of 61436340 in words is "sixty-one million, four hundred thirty-six thousand, three hundred forty".