742780 has 12 divisors (see below), whose sum is σ = 1559880. Its totient is φ = 297104.

The previous prime is 742759. The next prime is 742783. The reversal of 742780 is 87247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (742783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18550 + ... + 18589.

It is an arithmetic number, because the mean of its divisors is an integer number (129990).

2⁷⁴²⁷⁸⁰ is an apocalyptic number.

It is an amenable number.

742780 is an abundant number, since it is smaller than the sum of its proper divisors (817100).

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

742780 is a wasteful number, since it uses less digits than its factorization.

742780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37148 (or 37146 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 742780 is about 861.8468541452. The cubic root of 742780 is about 90.5635421602.

The spelling of 742780 in words is "seven hundred forty-two thousand, seven hundred eighty".