1913428 has 12 divisors (see below), whose sum is σ = 3652992. Its totient is φ = 869720.

The previous prime is 1913419. The next prime is 1913437. The reversal of 1913428 is 8243191.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1913419) and next prime (1913437).

It is a super-2 number, since 2×1913428² = 7322413422368, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1913396 and 1913405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21700 + ... + 21787.

It is an arithmetic number, because the mean of its divisors is an integer number (304416).

2^1913428 is an apocalyptic number.

It is an amenable number.

1913428 is a deficient number, since it is larger than the sum of its proper divisors (1739564).

1913428 is a wasteful number, since it uses less digits than its factorization.

1913428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43502 (or 43500 counting only the distinct ones).

The product of its digits is 1728, while the sum is 28.

The square root of 1913428 is about 1383.2671470110. The cubic root of 1913428 is about 124.1473274887.

The spelling of 1913428 in words is "one million, nine hundred thirteen thousand, four hundred twenty-eight".