61402740 has 48 divisors (see below), whose sum is σ = 196490112. Its totient is φ = 14034816.

The previous prime is 61402739. The next prime is 61402741. The reversal of 61402740 is 4720416.

It is an interprime number because it is at equal distance from previous prime (61402739) and next prime (61402741).

It is a self number, because there is not a number n which added to its sum of digits gives 61402740.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61402741) 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, 72679 + ... + 73518.

It is an arithmetic number, because the mean of its divisors is an integer number (4093544).

Almost surely, 2^61402740 is an apocalyptic number.

61402740 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61402740 is an abundant number, since it is smaller than the sum of its proper divisors (135087372).

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

61402740 is a wasteful number, since it uses less digits than its factorization.

61402740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146216 (or 146214 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 61402740 is about 7835.9900459355. The cubic root of 61402740 is about 394.5141492160.

The spelling of 61402740 in words is "sixty-one million, four hundred two thousand, seven hundred forty".