761978 has 16 divisors (see below), whose sum is σ = 1342464. Its totient is φ = 317520.

The previous prime is 761977. The next prime is 761983. The reversal of 761978 is 879167.

It is a happy number.

761978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×761978² = 1161220944968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (761977) 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, 218 + ... + 1253.

It is an arithmetic number, because the mean of its divisors is an integer number (83904).

2⁷⁶¹⁹⁷⁸ is an apocalyptic number.

761978 is a deficient number, since it is larger than the sum of its proper divisors (580486).

761978 is a wasteful number, since it uses less digits than its factorization.

761978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1517.

The product of its digits is 21168, while the sum is 38.

The square root of 761978 is about 872.9135123252. The cubic root of 761978 is about 91.3371544864.

It can be divided in two parts, 7 and 61978, that multiplied together give a triangular number (433846 = T₉₃₁).

The spelling of 761978 in words is "seven hundred sixty-one thousand, nine hundred seventy-eight".